Great Indian Bustard (Ardeotis nigriceps) - HBW 3, p. 264

Taxonomy:Otis nigriceps Vigors, 1831, Himalayas. In past, genus frequently labelled Choriotis, but Ardeotis has priority; genus sometimes merged with Otis. Present species forms superspecies with A. australis; these two sometimes separated from their two congeners in genus Austrotis, or, erroneously, in genus Choriotis, but type species of latter is A. arabs. Superspecies sometimes considered to include A. kori, as well as A. australis; all three have even been lumped into single species, A. kori. All four Ardeotis have occasionally been placed in same superspecies.. View all taxonomy...

Taxonomy: Otis nigriceps Vigors, 1831, Himalayas. In past, genus frequently labelled Choriotis, but Ardeotis has priority; genus sometimes merged with Otis. Present species forms superspecies with A. australis; these two sometimes separated from their two congeners in genus Austrotis, or, erroneously, in genus Choriotis, but type species of latter is A. arabs. Superspecies sometimes considered to include A. kori, as well as A. australis; all three have even been lumped into single species, A. kori. All four Ardeotis have occasionally been placed in same superspecies. Monotypic.